Remove a specified value from an array?

Question

I'm setting an array of IDs as "favourites" in localStorage,

var favIndex=$favourites.indexOf($titleId);
if(favIndex==-1){
    $favourites.push($titleId);
    $('#fav').addClass('favourited');
}
else{

    $('#fav').removeClass('favourited');
}

var favouritesJson=JSON.stringify($favourites);
localStorage.setItem('favourites',favouritesJson);
console.log(localStorage.getItem('favourites',favouritesJson));

If the value is not already in the array it will be added, in the else statement I need to remove $titleId from the array, is this possible and if so how?

Possible duplicate of [Remove a particular element from an array in JavaScript?](http://stackoverflow.com/questions/5767325/remove-a-particular-element-from-an-array-in-javascript) — Thriggle, Mar 14 '16 at 19:31

score 2 · Answer 1 · answered Mar 14 '16 at 19:29

2

Use the splice method that remove n elements from the given index:

if(favIndex==-1){
    $favourites.push($titleId);
    $('#fav').addClass('favourited');
} else {
    $favourites.splice(favIndex, 1);
    $('#fav').removeClass('favourited');
}

answered Mar 14 '16 at 19:29

cl3m

2,741
16
21

score 0 · Answer 2 · answered Mar 14 '16 at 19:31

0

use this link array.splice method http://www.w3schools.com/jsref/jsref_splice.asp

answered Mar 14 '16 at 19:31

Asad

2,264
4
17
45

score 0 · Answer 3 · answered Mar 14 '16 at 19:45

0

var favoritesIndex = $favourites.indexOf($titleId)

if( favoritesIndex > -1 ) {
    $favourites.splice( favoritesIndex, 1 );
    $('#fav').removeClass('favourited');
}
else{
    $favourites.push($titleId);
    $('#fav').addClass('favourited');
}

answered Mar 14 '16 at 19:45

justinledouxweb

1,139
2
11
26

Please explain how your answer solves the problem, don't just post code and expect people to understand. Thanks! – Aziz Mar 14 '16 at 20:48

Remove a specified value from an array?

3 Answers3